The ARKANSAS had to run through the entire Federal Fleet above Vicksburg to escape out of the Yazoo River or she was doomed. Fortunately for the ARKANSAS, most of the Fleet's ship boilers was stone cold leaving the Fleet with no immediate steam power. However, the entire Fleet fired ever available guns upon the ARKANSAS thus I assume your reported quote "an hours worth of Hail" has its meaning. I recall reading that one Federal Ellet ram had its steam up and was circling to ram the ARKANSAS; but an excellent shot from the ARKANSAS blew up her boiler, which disable the ram and killing and injuring many aboard. If the ARKANSAS was found as said then she had to be across the river from Baton Rouge as that is where she was blown up by her crew.